The Hellcat 6.2 liter V8 comes from the factory with a 2.4 liter twin screw supercharger with 11.6 psi of boost. It is very strong but for those wanting even more Magnuson offers a larger TVS2650 blower conversion for about $7k.

The question would be, at what point does the twin screw become more efficient than the TVS blower? A twin screw tends to show its advantage at higher boost levels. If spinning the blower faster and faster will the twin screw eventually win out?

Magnuson recently tested their TVS2650 out on a Challenger Hellcat at the Famoso dragstrip in California. The weather is very hot yet the car was said to run a 9.9 elapsed time. Magnuson did not post the slip.

It will be interesting to see how the TVS2650 roots stacks up to the Demon 2.7 liter twin screw. For those considering a larger blower, the TVS2650 certainly is worth a look. Hopefully more data will come.

TVS2650 Hybrid-roots supercharger

Installs in one day

100% complete bolt-on system

No hood modifications are required

More power in a smaller package

170deg. rotation of the supercharger provides a straight airflow path for maximum power and efficiency

The new TVS2650 is SUCH a good blower. It will be the only worthwhile blower upgrade for my V2 CTS-V (if they ever come out with our fitment).
There are rumors that the new ZR1 might use this blower too.

The new TVS2650 is SUCH a good blower. It will be the only worthwhile blower upgrade for my V2 CTS-V (if they ever come out with our fitment).
There are rumors that the new ZR1 might use this blower too.

I'm gaining a lot of respect for these blowers. I fell into the trap of thinking a bigger twin screw was always better. That is not necessarily the case. You need to pair the blower to the application.

I'm gaining a lot of respect for these blowers. I fell into the trap of thinking a bigger twin screw was always better. That is not necessarily the case. You need to pair the blower to the application.

Very common trap.
Also the reliability of these Eaton TVS blowers are the absolute best, they are the only rotor packs out there designed for 100k+mile service life of hard abuse.
And they are very efficient and don't generate a ton of heat.

I saw a CTS-V that was built by a certain shop with a 3.6L Kenne Bell and it made $#@! for power (like only 700whp) because the intake temps just cruising was in the 160's and in boost at redline they were well above 200 degrees lol.
The new shop building it taking off the KB and putting the ported stock 1900 TVS back on and should make well over 800whp.

Very common trap.
Also the reliability of these Eaton TVS blowers are the absolute best, they are the only rotor packs out there designed for 100k+mile service life of hard abuse.
And they are very efficient and don't generate a ton of heat.

I saw a CTS-V that was built by a certain shop with a 3.6L Kenne Bell and it made $#@! for power (like only 700whp) because the intake temps just cruising was in the 160's and in boost at redline they were well above 200 degrees lol.
The new shop building it taking off the KB and putting the ported stock 1900 TVS back on and should make well over 800whp.

These TVS blowers certainly seem to be more efficient. Numbers from some of the smaller blowers are topping the big whipples. I don't get it exactly as at high boost the Whipple should dominate.

These TVS blowers certainly seem to be more efficient. Numbers from some of the smaller blowers are topping the big whipples. I don't get it exactly as at high boost the Whipple should dominate.

Its usually that the packaging for the big blowers don't allow a big enough intercooler brick in the V of the engine.
So you are actually better off porting the smaller more efficient blower, spinning it faster, and making less heat.

If you are using Methanol as fuel then heat doesn't matter and the bigger the better. But even with E85 its better to be efficient.